Release : 17.2 \ 17.3
Component : CA SERVICE CATALOG
Update the offering value settings i.e 'Status on Approval' to be 'Fulfilled' which will be automatically change the status to completed once the Approvals are Done.
Note: Using Pending Fulfillment allows for more fulfillment business processes to be followed by using CA Process Automation processes.
If the request does not require fulfillment, then it reaches a state of Fulfilled.
Follow below document for additional information in regards to the Status Values